As an important node in urban city, power substation provides the clean energy to thousands of households, ensuring a stable and high quality of urban life. However, the influence of noise emission from substation is always underestimated. With the improvement of environmental consciousness, making the substations quietly hidden in urban cities becomes an urgent issue which should be thoroughly considered. A real case is presented in this paper to vividly reflect how such a comprehensive noise issue is faced and tackled through proper techniques and novel applications. Based on the low-frequency noise characteristics of 110 kV power transformers and the limited space features of indoor substation, integrated noise control schemes are proposed with consideration of low-noise design of ventilation and heat dissipation systems. Dynamic vibration absorber is firstly investigated and designed to minimize the vibration of transformer tank. After the practical implementation, the acoustic environment is reevaluated and the measurement results verified the noise control effect. Consequently, the acoustic environment quality within and out of substation is improved and the negative impact of urban substation is controlled.

变电站作为城市的重要节点，为千家万户提供清洁能源，保障城市生活的稳定和高品质。然而，变电站噪声排放的影响总是被低估。随着环保意识的提高，让变电站安静地隐藏在城市中成为亟待深入思考的问题。本文通过一个真实案例生动地反映了如何通过适当的技术和新颖的应用来面对和解决如此全面的噪声问题。针对110kV电力变压器的低频噪声特性和室内变电站空间有限的特点，提出了综合考虑通风散热系统低噪声设计的噪声控制方案。动态减振器首先被研究和设计，以最大限度地减少变压器油箱的振动。实际实施后，对声环境进行了重新评估，测量结果验证了噪声控制效果。从而改善了变电站内外的声环境质量，控制了城市变电站的负面影响。